177ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao/* ===-- fixunsxfdi.c - Implement __fixunsxfdi -----------------------------=== 277ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao * 377ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao * The LLVM Compiler Infrastructure 477ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao * 577ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao * This file is distributed under the University of Illinois Open Source 677ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao * License. See LICENSE.TXT for details. 777ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao * 877ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao * ===----------------------------------------------------------------------=== 977ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao * 1077ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao * This file implements __fixunsxfdi for the compiler_rt library. 1177ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao * 1277ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao * ===----------------------------------------------------------------------=== 1377ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao */ 1477ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao 1577ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao#if !_ARCH_PPC 1677ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao 1777ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao#include "int_lib.h" 1877ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao 1977ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao/* Returns: convert a to a unsigned long long, rounding toward zero. 2077ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao * Negative values all become zero. 2177ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao */ 2277ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao 2377ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao/* Assumption: long double is an intel 80 bit floating point type padded with 6 bytes 2477ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao * du_int is a 64 bit integral type 2577ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao * value in long double is representable in du_int or is negative 2677ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao * (no range checking performed) 2777ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao */ 2877ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao 2977ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao/* gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee | 3077ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao * 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm 3177ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao */ 3277ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao 3377ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liaodu_int 3477ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao__fixunsxfdi(long double a) 3577ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao{ 3677ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao long_double_bits fb; 3777ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao fb.f = a; 3877ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao int e = (fb.u.high.s.low & 0x00007FFF) - 16383; 3977ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao if (e < 0 || (fb.u.high.s.low & 0x00008000)) 4077ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao return 0; 4177ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao return fb.u.low.all >> (63 - e); 4277ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao} 4377ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao 4477ed6142daed1e068fbda64405d0de9845e40e1Shih-wei Liao#endif 45